期刊
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
卷 32, 期 1, 页码 65-91出版社
WILEY
DOI: 10.1111/j.1751-908X.2008.00870.x
关键词
thorium; isotope ratios; rock reference materials; MC-ICP-MS; consensus values
We present a concerted international effort to cross-calibrate five synthetic Th isotope reference materials (UCSC Th A, OU Th U, WUN, IRMM-35 and IRMM-36), and six rock reference materials (UCSC TML, Icelandic ATHO, USGS BCR-2, USGS W-2, USGS BHVO-2, LV18) using multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS). We then compare our new values with a compilation of literature mass spectrometric data for these reference materials and derive recommended consensus Th-230/Th-232 values for each. We also present isotope dilution U and Th concentration data for four rock reference materials (UCSC TML, Icelandic ATHO, USGS BCR-2, USGS W-2).
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